A researcher wishes to estimate the proportion of adults who
have​ high-speed Internet access. What size...
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A researcher wishes to estimate the proportion of adults whohave​ high-speed Internet access. What size sample should beobtained if she wishes the estimate to be within 0.04 with
95% confidence if
(a) she uses a previous estimate of 0.28?
​(b) she does not use any prior​ estimates?
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Solution Given thatmargin of error E 004At 95
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